#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>


int main()
{
	int a = 10;
	a = a << 1;//a <<= 1;
	//int b = a << 1;
	//10
	//00000000000000000000000000001010
	//
	//printf("b = %d\n", b);
	printf("a = %d\n", a);

	return 0;
}